Display image from photos.pick_image?browsing

I’m playing around with displaying a photo from the photo library in a very simple script; however, I’m doing something wrong: where the image should be, it displays white in the shape that the image ought to be:

Are you sure you didn’t make any other changes to get it to work? I verified before adding the super() call that I was able to drag red dots across the screen; and after adding super() I still see only a white rectangle in the lower-left where the image ought to be. (Dragging red dots continues to work.)

Yeah that is all I changed.
Could it be an issue with the image itself?
What if, just for debug, you do a mapimage.show() to put it on the console, right after you get it from photos.pick_image. To see what it looks like there.

I tried this on all of the images I'd been using for testing, and in each case, I saw the image twice in the console after hitting the "x" in the upper right of the scene. But it still displays just a white rectangle (surrounded by yellow) in the scene (which I can move red dots around on).